<div class="apiDetail">
    <div>
        <h2><span>Function(treeId, parentNode, responseData)</span><span class="path">setting.async.</span>dataFilter
        </h2>
        <h3>Overview<span class="h3_info">[ depends on <span
                class="highlight_green">jquery.ztree.core</span> js ]</span></h3>
        <div class="desc">
            <p></p>
            <div class="longdesc">
                <p>Callback function to pre-process Ajax return data. It is valid when <span class="highlight_red">[setting.async.enable = true]</span>
                </p>
                <p>Default: null</p>
            </div>
        </div>
        <h3>Function Parameter Descriptions</h3>
        <div class="desc">
            <h4><b>treeId</b><span>String</span></h4>
            <p>zTree unique identifier: <b class="highlight_red">treeId</b></p>
            <h4 class="topLine"><b>parentNode</b><span>JSON</span></h4>
            <p>Parent node's JSON data object</p>
            <p class="highlight_red">When asynchronously loading the root, the parentNode = null</p>
            <h4 class="topLine"><b>responseData</b><span>Array(JSON) / JSON / String</span></h4>
            <p>Array (JSON) / JSON / String data objects</p>
            <p class="highlight_red">From v3.4, support XML strings.</p>
            <h4 class="topLine"><b>Return </b><span>Array(JSON) / JSON</span></h4>
            <p>The return value should be the JSON data structure which is supported by the zTree.</p>
            <p class="highlight_red">v3.x supports to load single node JSON data object.</p>
        </div>
        <h3>Examples of setting & function</h3>
        <h4>1. Modify the node name attributes returned by an Ajax request.</h4>
        <pre xmlns=""><code>function ajaxDataFilter(treeId, parentNode, responseData) {
    if (responseData) {
      for(var i =0; i < responseData.length; i++) {
        responseData[i].name += "_filter";
      }
    }
    return responseData;
};
var setting = {
	async: {
		enable: true,
		url: "http://host/getNode.php",
		dataFilter: ajaxDataFilter
	}
};
......</code></pre>
    </div>
</div>